Soil inorganic carbon stock in the Tibetan alpine grasslands

doi:10.1029/2010GB003804

CORC > 北京大学 > 城市与环境学院

	Soil inorganic carbon stock in the Tibetan alpine grasslands
	Yang, Yuanhe ; Fang, Jingyun ; Ji, Chengjun ; Ma, Wenhong ; Su, Shenshen ; Tang, Zhiyao
刊名	global biogeochemical cycles
	2010
关键词	ORGANIC-CARBON CLIMATE-CHANGE STORAGE CHINA PERMAFROST NITROGEN PLATEAU TEMPERATURE SENSITIVITY DYNAMICS
DOI	10.1029/2010GB003804
英文摘要	As the largest carbon pool in the terrestrial biosphere, soil carbon stock consists of organic and inorganic components. However, previous studies dominantly concentrated on soil organic carbon (SOC) stock, and little is known about the magnitude and patterns of soil inorganic carbon (SIC). In this study, we evaluated the magnitude of SIC stock in the Tibetan alpine grasslands using data from 405 profiles surveyed from 135 sites across the plateau during 2001-2004. Kriging interpolation was conducted to interpolate site-level observations to the regional level. We also compared spatial and vertical distributions of SIC stock with the corresponding patterns of SOC stock in the Tibetan alpine grasslands. Our results showed that SIC stock in the top 1 meter in the Tibetan alpine grasslands was approximately 15.2 Pg C (1 Pg = 10(15) g), with an average density (amount per area) of 13.46 kg C m(-2). SIC density exhibited different spatial and vertical distributions in comparison with SOC density. Spatially, SIC density in the alpine steppe was larger than that in the alpine meadow, in contrast to SOC distribution. Vertically, SIC stock in the upper 30 and 50 cm accounted for 47.6% and 71.6%, respectively, of that in the upper 1 meter, with lower proportions than that of SOC stock in the same interval (67.8% and 83.3%). In total, SIC stock in the Tibetan alpine grasslands was about 2.1 times the corresponding SOC stock, accounting for 28.5% of the total SIC stock in China. These results highlight that SIC stock in the Tibetan grasslands could make a significant contribution to China's terrestrial carbon balance.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000285015900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Environmental Sciences; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences; SCI(E); 12; ARTICLE; 24
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/322358]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Yang, Yuanhe,Fang, Jingyun,Ji, Chengjun,et al. Soil inorganic carbon stock in the Tibetan alpine grasslands[J]. global biogeochemical cycles,2010.
APA	Yang, Yuanhe,Fang, Jingyun,Ji, Chengjun,Ma, Wenhong,Su, Shenshen,&Tang, Zhiyao.(2010).Soil inorganic carbon stock in the Tibetan alpine grasslands.global biogeochemical cycles.
MLA	Yang, Yuanhe,et al."Soil inorganic carbon stock in the Tibetan alpine grasslands".global biogeochemical cycles (2010).